45kG鞍形超電導電磁石 (その2)
ヘリウム冷却系の計画設計
1970 年 5 巻 2 号 p. 83-88
詳細
1970 年 5 巻 2 号 p. 83-88
Recently, much developing work on large superconducting magnet for MHD power generation has been in progress, in which the arrival of liquid helium cooling system capable of stable and low-cost operation is one of the essential matter. For this, we have developed a closed cycle cooling system for 45kG saddle shaped magnet of 12 tons. The system is composed of 28l/hr helium liquefier, liquid helium storage, 20°K helium refrigerator with cooling capacity of 400 watt at 20°K, helium recovery system with 80Nm3/hr at 130 atm and instrumentation, which has following basic functions; to precooling the magnet to less than 20°K, to liquefy helium continuously and supply liquid helium, and to recover and reprocess any evaporated helium gas from the cryostat.
